Turns out that rawhide packages now use XZ (the new LZMA format) as the default payload compression format. The details of this new feature can be found on the XZRpmPayloads feature page. Testers that install directly from Fedora 12 or rawhide should not experience problems. However, folks upgrading from Fedora 11 or from an older rawhide may need to manually workaround this issue using the following commands: